Collins said he will not make a decision on the rotation until more is known about Niese’s condition. The manager indicated he is worried.

“When [the shoulder] bothers you on a night where it’s warm, I am a little concerned, yeah,” Collins said.

It’s not the first time this season Niese’s shoulder has been an issue. The lefty skipped a start in Miami this month with tendinitis in the shoulder, but returned to face the Marlins on June 9 at Citi Field and indicated he was fine physically. He then faced the Cubs six days later.

“It was a lot worse before,” Niese said. “After I left the game everything settled down in here and the pain went away, so we’ll see how it goes.”